Erik Svensson

Config Cisco Nexus L3 vlan routing IPv4

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This is a simple how to make a nexus switch L3 routeing and the connected access switches still on L2 switching. If you have a router connected between internet and the router switch. Make shure you have a static route configured to the two vlan network.

Router Switch

no system default interface-vlan autostate (brings up the vlan)

conf t

vlan 10  (creates vlan 10 L2)

name Servers vlan 10

exit

vlan 20 (creates vlan 20 L2)

name Servers vlan 20

exit

feature interface-vlan  (Converts L2 vlan 10 to L3 vlan 10)

interface vlan 10
ip address 1.1.1.1/24
no ip redirects

exit

feature interface-vlan  (Converts L2 vlan 20 to L3 vlan 20)
interface vlan 20
ip address 2.2.2.2/24
no ip redirects

exit

interface ethernet 1/1 (creates tagged vlan port to access sw1)
  description To Access Sw1
switchport 
switchport mode trunk
  no shutdown

exit

interface ethernet 1/2 (creates tagegd vlan port to access sw1)
  description to Access Sw2
switchport 
switchport mode trunk
no shutdown

exit

interface ethernet 1/3 (Creates the link network port)
description to Internet
no switchport
ip address 3.3.3.1/30
no shutdown

exit

ip route 0.0.0.0 0.0.0.0 3.3.3.2 (makes default router to next hop router)

copy running-config startup-config

Access Sw1

conf t

vlan 10 (creates vlan 10 L2)

name Servers vlan 10

exit

vlan 20 (creates vlan 20 L2)

name Servers vlan 20

exit

interface ethernet 1/1 (creates tagged vlan port to Router switch)
description To Router Switch
switchport 
switchport mode trunk
no shutdown

exit

interface ethernet 1/2 (creates untagged vlan 10 port to servers)
description Access vlan 10
switchport 
switchport mode access vlan 10
no shutdown

exit

interface ethernet 1/3 (creates untagged vlan 20 port to servers)
description  Access vlan 20
switchport 
switchport mode access vlan  20
no shutdown

exit

copy running-config startup-config

Access Sw2

conf t

vlan 10 (creates vlan 10 L2)

name Servers vlan 10

exit

vlan 20 (creates vlan 10 L2)

name Servers vlan 20

exit

interface ethernet 1/1 (creates tagged vlan port to Router switch)
description To Router Switch
switchport 
switchport mode trunk
no shutdown

exit

interface ethernet 1/2 (creates untagged vlan 10 port to servers)
description Access vlan 10
switchport 
switchport mode access vlan 10
no shutdown

exit

interface ethernet 1/3 (creates untagged vlan 20 port to servers)
description  Access vlan 20
switchport 
switchport mode access vlan  20
no shutdown

exit

copy running-config startup-config

Stefan Helander

iFAQ auto expand all [solution]

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The Joomla! extension iFAQ from Ideal Extensions is a nice way of building a FAQ (Frequently Asked Questions) section on your website.

One feature I am missing though is to be able to select wether a FAQ list of articles should default to all open instead of closed. This is a simple workaround.

Add a module of the type Custom HTML and edit the module content using no editor. Publish the module in a suitable module position, like Debug.

Insert the following javascript into the module (remember, no editor mode):

<script>
jQuery(document).ready(function($) { 
  jQuery( "#expand-all" ).click(); 
});
</script>

By selecting which menu items the module is displayed for, you can choose the FAQ pages where you want to have the articles expanded by default.

Stefan Helander

Prestashop multistore – can’t get out of maintenance mode

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After maintenance even though setting to shop to active, frontend still shows maintenance mode. This can occur when multistore is enabled.

Solution:

  • Use for example phpMyAdmin to access the shop database
  • Find the ps_configuration table
  • Find all records with the name PS_SHOP_ENABLE and change them from ‘0’ to ‘1’ (there are probably more than one)
Joomla breadcrumbs not working, solved in JoomSEF by entering ItemID
Stefan Helander

Breadcrumbs only showing “Home” for Joomla article

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A Joomla article was published through a menu item (single article) but the breadcrumbs when displaying the article only showed “Home” (not clickable). The menu path and article title was missing in the breadcrumbs.

In this case JoomSEF was installed on the site. The solution was to find the SEF URL in JoomSEF (go to “Manage SEF URLs”). The ItemID field was empty.

The problem was solved by entering the menu ID for the menu item displaying the article in the ItemID field, saving and clearing the cache.

Stefan Helander

WordPress shows white page after site move

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WordPress just showing a white page means it is experienceing PHP errors. When it occurs after a site has been moved from one hosting to another it can be caused by several reasons.

To make it possible to track down the cause you can temporarily add the following to the .htaccess file in the root. If this gives you a internal server error 500 it means it is not allowed by the host. If allowed, you will get error messages from PHP dispayed on screen when accessing the site:

php_flag display_startup_errors on
php_flag display_errors on

There are visbible PHP ending tags ?> on the site

If you see more or less normal output from the site but once in a while you see lines ending with ?>. This can happen if the site has been running on PHP 5 where the short PHP start tag <? is allowed (instead of the longer <?php.

If the site has been moved to PHP 7 where this is not longer allowed, it can cause this kind of strange behaviour.

If you don’t want to go through all the code and find all the occurrences of <? and replace them with <?php (which is one solution), you can simply add the following to your php.ini:

short_open_tag=On

You need to restart Apache after this.

Wordfence plugin is installed

You need to manually edit the system specific paths in the following files:

  • .user.ini in the site root, change the path after auto_prepend_file
  • wordfence-waf.php in the site root, change the paths on all occurrences

WP Rocket plugin is installed

The file wp-content/advanced-cache.php contains system specific paths. You can manually update them or just simply delete the file and login to wp-admin of the site and it will be recreated automatically with the correct paths.

Stefan Helander

Call Book Log 3 installation with custom database name

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Call Book Log 3 is a log book program for radio amateurs, hosted on a web server, based on PHP 7 and MySQL/mariaDB.

The database for the software is named ‘hamcallbook‘ by default but if you are going to host it on a server where you can’t choose the name of the database, like a web hosting company (“web hotel”) it will not install.

The solution is to simply edit the file setup2.php before starting the installation process. Search for all occurrences of ‘hamcallbook‘ and replace it with your database name.

After installing, edit the file dbconnect.php, find ‘hamcallbook‘ and replace it with your database name.

pfsense IPsec phase 1 disable rekey
Stefan Helander

pfsense IPsec VPN tunnel disconnects after 8 hours

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I’ve been troubled by the annoying disconnection of the IPsec VPN tunnel on a pfsense firewall. The tunnel disconnects after about 8 hours.

The solution in my case was to enable “Disable rekey” which “Disables renegotiation when a connection is about to expire.“. The setting is found under Phase 1 advanced settings.

Disable rekey setting under Phase 1 Advanced settings
Stefan Helander

MySQL Error 1215: Cannot add foreign key constraint

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Check that both tables have the same engine type, so there isn’t a mix of for example MyISAM and InnoDB.

Stefan Helander

rm unable to delete file even as root or sudo [Solved]

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When it is not possible to delete a file using rm even when logged in as root or by using sudo, check the file attributes with:

lsattr filename.ext

If it has the “i” attribute, this is preventing the file from being deleted, even by super users. When you have verified the reason for this and still want to delete the file then remove the “i” attribute with:

chattr -i filename.ext

Then delete the file using rm as you normally would.